1 Disable auto update

> sudo zypper -n install git
PackageKit is blocking zypper. This happens if you have an updater
applet or other software management application using PackageKit running.
Tell PackageKit to quit? [yes/no] (no): no
System management is locked by the application with pid 1573
(/usr/lib/packagekitd).
Close this application before trying again.

You must uninstall PackageKit for disabling packagekit.service because packagekit.service is static systemd units. Uninstalling PackageKit will uninstall Apper.

> sudo zypper -n remove PackageKit

2 PackageKit

PackageKit runs auto update by default. This auto update interval is fixed by the following files.

Set AOU_AUTO_AGREE_WITH_LICENSES and AOU_INCLUDE_RECOMMENDS in /etc/sysconfig/automatic_online_update. If AOU_ENABLE_CRONJOB is false,
/etc/cron.[interval]/opensuse.org-online_update does not do update.